972 TRIFOLIUM. [CLASS XVII. ORDER III. 
Inflorescence a terminal globose head of numerous rather loose 
flowers, elevated on a short or long peduncle. Calya cylindrical, ten 
ribbed, smooth, the teeth bristle-shaped, and hairy, the lower tooth 
much longer than the others, the mouth hairy. Corolla a pale 
purple. Seeds irregularly heart-shaped, the radical very prominent. 
Habitat.— Pastures and meadows ; frequent. 
Perennial ; flowering in July. 
The different habit of this species renders it a preferable plant for 
heavy soils, and its spreading roots enable it to resist long seasons of 
drought ; hence it is that it flourishes better in a tenacious soil, and is 
better suited for permanent pastures than the 7. pratense. From the 
experiments, however, which have been made with it, and comparing 
the quantity of nutritious matter which it affords with that of 7’ 
pratense, it seems in all cases to be only about one half; so that how- 
ever useful it may be in the circumstance above mentioned, it is not 
the species that the farmer would select for a hay crop. It varies 
according to the situation of its growth as to size and hairiness, and 
the heads are elevated upon a short or long pedicle, but in other 
respects it is constant in its characters. 
3. T. ochroleu'cum, Linn. (Fig. 1124.) Sulphur-coloured Trefoil. 
Heads terminal, solitary, pedunculated ; calyx ten ribbed, pubescent, 
the mouth closed with a ring, erect teeth, awl-shaped, the lower one 
longest, at length reflexed ; leaves distant; leaflets elliptic, or obovate, 
entire, or notched at the apex, downy, the lower ones heart-shaped ; 
stipules lanceolate, awl-shaped ; stem ascending. 
English Botany, t. 1224.—Englisb Flora, vol. iii. p. 301.—Hooker, 
British Flora, ed. 4. vol. i. p. 275.—Lindley, Synopsis, p. 80. 
Root tapering. Stems mostly several, ascending, from twelve to 
eighteen inches high, round, more or less branched, and clothed with 
short erect tawny hairs. Leaves distant, the lower ones alternate, with 
long footstalks and leaflets, ovate, or heart-shaped, the upper pair of 
leaves opposite, and the leaflets narrow, oblong, lanceolate. Stipules 
lanceolate, with a taper point, pale, membranous, striated, with 
coloured ribs, downy. Inflorescence a terminal globose head of dense 
pale sulphur coloured flowers, elevated on a hairy pedicle, of greater 
or less length. Calyx cylindrical, ten ribbed, and furrowed, downy, 
the teeth five, unequal, the lower one much the longest, and reflexed 
in seeds, the margins ciliated. Zegume small, membranous. Seeds 
solitary, yellow. 
Habitat.—Pastures and road sides, especially in a light gravelly 
soil; not unfrequent. 
Perennial ; flowering in July and August. 
This as an agricultural plant seems very inferior to the above 
species, and is not cultivated alone, or intentionally to any con- 
siderable extent with any other. The heads of the flowers are at first 
